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Enhanced API Scanning with Postman Support in Qualys WAS

Due to the fast-growing usage of REST APIs, having a way to test them for vulnerabilities in an automated, reliable way is more important than ever.  Automated testing of APIs is a little trickier than for web applications.  You can’t simply enter a starting URL for the scanner and click “Go”.  Additional setup is required to describe the API endpoints for the scanner.  The good news is that Qualys Web Application Scanning (WAS) offers multiple ways to set up a scan for your APIs.

Up to now Qualys WAS has provided two methods to set up scanning of your APIs:

  1. Proxy capture method
  2. Swagger/OpenAPI file method

Now, WAS supports a 3rd method – Postman Collections. As we’ll explain, this method can provide better vulnerability testing compared to the others.

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REST API Testing with Qualys Web Application Scanning

With more web applications exposing RESTful (or REST) APIs for ease of use, flexibility and scalability, it has become more important for web application security teams to test and secure those APIs. But APIs (including REST APIs) introduce some behaviors that make it difficult for web application scanners to test them for vulnerabilities.

New features in Qualys Web Application Scanning (WAS) overcome these difficulties.

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Path Fuzzing Challenges

Web application scanners often struggle to scan applications that incorporate parameters into their URL paths, specifically web apps that use URL-rewrite techniques or web apps with REST APIs that take URL parameters. One key approach is to fuzz the application’s URL parameter inputs in order to identify possible injection points for malicious code. But without knowledge of the URL structure, it’s difficult for scanners to fuzz those parameters efficiently and with full coverage, which is required for an effective scan.

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